Mercurial > hg > mercurial-crew-with-dirclash

annotate hgext/extdiff.py @ 2333:de0c05afa511

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new extension: extdiff. allows to use external diff program.
author Vadim Gelfer <vadim.gelfer@gmail.com>
date Sun, 21 May 2006 23:39:07 -0700
parents
children 391c5d0f9ef3
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2333
de0c05afa511 new extension: extdiff. allows to use external diff program.
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1 # extdiff.py - external diff program support for mercurial
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2 #
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7 #
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8 # allow to use external programs to compare revisions, or revision
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9 # with working dir. program is called with two arguments: paths to
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10 # directories containing snapshots of files to compare.
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11 #
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12 # to enable:
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13 #
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14 # [extensions]
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15 # hgext.extdiff =
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16 #
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17 # also allows to configure new diff commands, so you do not need to
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18 # type "hg extdiff -p kdiff3" always.
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19 #
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20 # [extdiff]
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21 # # add new command called vdiff, runs kdiff3
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22 # cmd.vdiff = kdiff3
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23 # # add new command called meld, runs meld (no need to name twice)
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24 # cmd.meld =
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25 #
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26 # you can use -I/-X and list of file or directory names like normal
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27 # "hg diff" command. extdiff makes snapshots of only needed files, so
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28 # compare program will be fast.
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29
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30 from mercurial.demandload import demandload
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31 from mercurial.i18n import gettext as _
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32 from mercurial.node import *
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33 demandload(globals(), 'mercurial:commands,util os shutil tempfile')
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34
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35 def dodiff(ui, repo, diffcmd, pats, opts):
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36 def snapshot_node(files, node):
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37 '''snapshot files as of some revision'''
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38 changes = repo.changelog.read(node)
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39 mf = repo.manifest.read(changes[0])
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40 dirname = '%s.%s' % (os.path.basename(repo.root), short(node))
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41 base = os.path.join(tmproot, dirname)
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42 os.mkdir(base)
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43 if not ui.quiet:
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44 ui.write_err(_('making snapshot of %d files from rev %s\n') %
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45 (len(files), short(node)))
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46 for fn in files:
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47 wfn = util.pconvert(fn)
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48 ui.note(' %s\n' % wfn)
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49 dest = os.path.join(base, wfn)
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50 destdir = os.path.dirname(dest)
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51 if not os.path.isdir(destdir):
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52 os.makedirs(destdir)
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53 repo.wwrite(wfn, repo.file(fn).read(mf[fn]), open(dest, 'w'))
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54 return dirname
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55
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56 def snapshot_wdir(files):
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57 '''snapshot files from working directory.
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58 if not using snapshot, -I/-X does not work and recursive diff
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59 in tools like kdiff3 and meld displays too many files.'''
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60 dirname = os.path.basename(repo.root)
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61 base = os.path.join(tmproot, dirname)
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62 os.mkdir(base)
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63 if not ui.quiet:
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64 ui.write_err(_('making snapshot of %d files from working dir\n') %
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65 (len(files)))
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66 for fn in files:
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67 wfn = util.pconvert(fn)
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68 ui.note(' %s\n' % wfn)
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69 dest = os.path.join(base, wfn)
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70 destdir = os.path.dirname(dest)
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71 if not os.path.isdir(destdir):
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72 os.makedirs(destdir)
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73 fp = open(dest, 'w')
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74 for chunk in util.filechunkiter(repo.wopener(wfn)):
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75 fp.write(chunk)
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76 return dirname
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77
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78 node1, node2 = commands.revpair(ui, repo, opts['rev'])
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79 files, matchfn, anypats = commands.matchpats(repo, pats, opts)
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80 modified, added, removed, deleted, unknown = repo.changes(
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81 node1, node2, files, match=matchfn)
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82 if not (modified or added or removed):
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83 return 0
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84
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85 tmproot = tempfile.mkdtemp(prefix='extdiff.')
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86 try:
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87 dir1 = snapshot_node(modified + removed, node1)
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88 if node2:
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89 dir2 = snapshot_node(modified + added, node2)
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90 else:
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91 dir2 = snapshot_wdir(modified + added)
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92 util.system('%s %s "%s" "%s"' %
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93 (diffcmd, ' '.join(opts['option']), dir1, dir2),
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94 cwd=tmproot)
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95 return 1
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96 finally:
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97 ui.note(_('cleaning up temp directory\n'))
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98 shutil.rmtree(tmproot)
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99
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100 def extdiff(ui, repo, *pats, **opts):
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101 '''use external program to diff repository (or selected files)
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102
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103 Show differences between revisions for the specified files, using
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104 an external program. The default program used is "diff -Pnru".
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105 To select a different program, use the -p option. The program
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106 will be passed the names of two directories to compare. To pass
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107 additional options to the program, use the -o option. These will
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108 be passed before the names of the directories to compare.
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109
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110 When two revision arguments are given, then changes are
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111 shown between those revisions. If only one revision is
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112 specified then that revision is compared to the working
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113 directory, and, when no revisions are specified, the
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114 working directory files are compared to its parent.'''
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115 return dodiff(ui, repo, opts['program'] or 'diff -Npru', pats, opts)
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116
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117 cmdtable = {
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118 "extdiff":
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119 (extdiff,
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120 [('p', 'program', '', _('comparison program to run')),
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121 ('o', 'option', [], _('pass option to comparison program')),
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122 ('r', 'rev', [], _('revision')),
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123 ('I', 'include', [], _('include names matching the given patterns')),
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124 ('X', 'exclude', [], _('exclude names matching the given patterns'))],
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125 _('hg extdiff [OPT]... [FILE]...')),
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126 }
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127
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128 def uisetup(ui):
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129 for cmd, path in ui.configitems('extdiff'):
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130 if not cmd.startswith('cmd.'): continue
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131 cmd = cmd[4:]
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132 if not path: path = cmd
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133 def save(cmd, path):
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134 '''use closure to save diff command to use'''
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135 def mydiff(ui, repo, *pats, **opts):
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136 return dodiff(ui, repo, path, pats, opts)
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137 mydiff.__doc__ = '''use %s to diff repository (or selected files)
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138
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139 Show differences between revisions for the specified
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140 files, using the %s program.
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141
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142 When two revision arguments are given, then changes are
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143 shown between those revisions. If only one revision is
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144 specified then that revision is compared to the working
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145 directory, and, when no revisions are specified, the
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146 working directory files are compared to its parent.''' % (cmd, cmd)
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147 return mydiff
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148 cmdtable[cmd] = (save(cmd, path),
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149 cmdtable['extdiff'][1][1:],
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150 _('hg %s [OPT]... [FILE]...') % cmd)